Adsorpsi Ion Tembaga (Cu) dan Ion Besi (Fe) dengan Menggunakan Arang Hayati (Biocharcoal) Kulit Pisang Raja (Musa Sapientum)

This study determine the contact time, pH, and the optimum concentration of the solution of copper (Cu) and iron (Fe) from skin the plantain (musa sapientum). Advances in the industry today resulted in many human activities that caused increasing impact of the pollution on surrounding of the environment. Environmental pollution by heavy metals being a serious problem along with increasing the use of heavy metals in the industry. The method used in this study was a laboratory experiment using colorimeter. The results showed that the adsorption of copper and iron on the plantain bark influence a time variation of Cu and Fe occurred in the 60 minute and 30 minute (99.64% and 99.54%); variation of pH for Cu and Fe occurrs in pH 4 and pH 3 (99.62% and 99.58%) and variation of concentration for Cu and Fe occurred at 20 ppm and 1 ppm (80.74% and 96.81%), respectively

New Multi-Step Runge-Kutta Method For Solving Fuzzy Differential Equations

This paper presents solution for the first order fuzzy differential equation by Runge Kutta method of order two with new parameters which are used in the main formula in order to increase the order of accuracy of the solution. This method is discussed in detail followed by a complete error analysis. The accuracy and efficiency of the proposed method is illustrated by solving a fuzzy initial value problem. Keywords: Fuzzy differential equations, multi-step Runge-Kutta method, higher order derivative approximations, harmonic mean

Implicative Filters In Quasi Ordered RL-Wajsberg Algebras

This article introduces the idea of implicative filters in quasi ordered RL-Wajsberg algebras and uses examples to explore some of its features.Comment:

MULTI_LEVEL SECURE FROM WEB INTRUSION AND QUERY ATTACKS ON WEB DATABASE

Most data frameworks and business applications assembled these days have a web frontend and they should be generally accessible to customers, representatives and accomplices around the globe, as the computerized economy is turning out to be increasingly pervasive in the worldwide economy. Strategy and a model instrument to assess web application security components. In this paper, we along these lines propose to make trusted equipment a top notch national in the safe information administration field. Additionally, we trust that cost-driven bits of knowledge and compositional standards will generally change the way frameworks and calculations are planned. We present an outsourced database model that permits customers to execute SQL questions with security and under administrative consistence imperatives by utilizing server-facilitated, sealed trusted equipment in basic inquiry preparing stages, along these lines expelling any confinements on the kind of bolstered inquiries

Designing of MATLAB Program for Various Fuzzy Quality Regions in CSP-MLP-T-3 Sampling plan

In this paper, an optimal designing methodology is proposed to determine the parameters for Multi-Level Continuous Sampling Plans CSP-MLP-T-3, when the lifetime of the product follows generalized exponential distribution. The two points on the operating characteristic curve approach are used to find the optimal parameters for the proposed plan. The plan parameters are determined through Quality Decision Region

Mathematical model to study The spread of spilled oil in the soil

A mathematical model describing the spread of spilled oil through the soil is discussed. The spread of spilled oil in soil is controlled by the flow of water and is described by multiphase equations. In this context, the two-phase flow characteristics of oil-water flow with varying viscosity in the subsurface coupled to an advective-diffusion equation are examined to study the transport of oil. The terms that model the interaction between the multiple phases are introduced at the boundary, such as the slip condition at the porous-fluid interface, shear stress condition at the fluid-fluid interface, and the continuity of velocity at both the interfaces. The effect of various physical parameters such as Schmidt number, retardation factor, viscosity ratio, porous and slip parameter on the velocity and concentration profiles are discussed in detail with the help of graphs. The surface plots of velocity and concentration of oil against axial distance at different time are also analyzed. The obtained results show that the velocity of oil accelerates linearly with axial length and there is a decrease in the concentration of the spilled oil through the media. The validity of the results obtained is verified by comparison with available experimental result, and good agreement is found

Study of Spilled Oil Behavior on the Topsoil Induced by Thermal Diffusion

The fate and transport of oil spilled in soil has long been a focus for experimental and theoretical research in subsurface hydrology. Oil transport in the soil is affected by a large number of physical, chemical and microbial processes; and the properties of the media. This study is a two layer problem containing horizontal oil layer overlying the subsurface topsoil region saturated with oil and water (native fluid). To explain the method by which the convective flow in the oil region affect the transportation of oil, modeling is carried out in two regions (oil and topsoil). The two dimensional, transient oil flow equations for both the regions include thermal and concentration buoyancy effects. The species equations include the effects of energy flux caused by the temperature gradient on the unsteady advective-diffusion equation. The resulting fluid flow, heat and mass transfer processes are discussed numerically with the aid of graphs. The validity of the results obtained is verified by comparison with available results and good agreement is found

Magnetic and Transport Properties of Ternary Indides of type R2CoIn8 (R = Ce, Pr and Dy)

We have synthesized and investigated the magnetic and transport properties of a series of compounds, R2CoIn8 (R = rare earth). Compounds form in single phase with a tetragonal structure (space group P4/mmm, no. 162). The Ce compound shows heavy fermion behavior. The magnetic susceptibility of Pr2CoIn8 shows a marked deviation from the Curie-Weiss behavior at low temperatures, which is attributed to the crystalline electric field effects. Heat capacity and magnetization measurements show that Dy2CoIn8 undergoes a magnetic transition at 17 K and a second transition near 5 K, the latter of which may be due to spin reorientation. Magnetization of this compound shows two metamagnetic transitions approximately at 3.6 T and 8.3 T.Comment: Total 7 pages of text and figure